I don't care what your graphs saw Jeff. They have broken countlessly on my350z. There's constantly a thread about crawford plenums breaking or leaking created on my350z, since they have far more FI cars than we do. Once again, once again.

Oh, and I was thinking cosworth when I said the new "crawford" plenum.

Here's the thread on the most recent crawford blow:
http://my350z.com/forum/showthread.php?t=342161

 

1) Where in the OP's post does he say he's going FI? I have not read about any plenum breaking on a NA application
2) Crawford's OLDER plenums were prone to leaking but it was easily solved via another gasket.
3) You can also see that the owner did NOT even blame the plenum. The engine BACKFIRED and sent a huge shockwave up and though the intake tract.
I still stand by my post 100%. The kinetix is not nearly as good vs the spacers or crawford plenum. Why someone would use the kinetix "just because they dont" break on FI cars is terrible logic. If the V5 crawford has a problem when FI'd fine. Use a spacer that has all the strength of the oem plenum and the gains to actually justify the cost. The kinetix offers none of the gains to justify purchasing one IMHO. MAYBE if you got one so cheap you couldn't pass on it.